[Campbell Biology P.958] According to Figure 41.12 and the accompanying text, what are the p... | Practice Question

According to Figure 41.12 and the accompanying text, what are the primary pathways for the absorption of amino acids/sugars and fatty acids/monoglycerides, respectively, after digestion in the small intestine?

  • A: Both amino acids/sugars and fatty acids/monoglycerides are absorbed into the bloodstream.
  • B: Both amino acids/sugars and fatty acids/monoglycerides are absorbed into the lymphatic system.
  • C: Amino acids/sugars enter the bloodstream, while fatty acids/monoglycerides enter the lymphatic system.
  • D: Amino acids/sugars enter the lymphatic system, while fatty acids/monoglycerides enter the bloodstream.

Explanation

Figure 41.12 clearly illustrates that amino acids and sugars water-soluble nutrients are absorbed into the blood capillaries, which eventually lead to the bloodstream vein carrying blood to liver . Conversely, fatty acids and monoglycerides components of fats, which are lipid-soluble are absorbed into the lacteal, a lymphatic vessel, which is part of the lymphatic system. The text explicitly states, "Water-soluble nutrients, such as amino acids and sugars, enter the bloodstream, whereas fats are transported to the lymphatic system."